DER Growth Scenarios and Load Forecasts Working Group

Distributed Energy Resource Growth Scenarios and Distribution Load Forecasting 

This Working Group is part of the Distribution Resources Plan (DRP) proceeding’s (R.14-08-013) Track 3 (Policy) Sub-track 1 (DER Adoption and Distribution Load Forecasting) activities, and is being organized pursuant to the Assigned Commissioner’s Ruling (ACR) issued February 27 in this proceeding. The purpose of this Working Group is to provide an opportunity for interested stakeholders and IOUs to discuss approaches to load and DER forecasting for distribution planning.

The Working Group met from April 17-May 24, 2017, and from April 18- June 13, 2018 to vet the following topics:

  • System-wide DER growth assumptions
  • Load forecasting at the distribution level
  • Methodologies for the disaggregation of system-level DER forecasts to circuits

Final Reports are posted here:

2017:  Revised Distributed Energy Resource Assumptions & Framework

2018:  Distribution Forecasting Working Group Final Report

IOUs may be contacted via their respective case managers:

  • PG&E: Samantha Weaver,
  • SCE: Allison Guilliatt,
  • SDG&E: Joe McCawley,

CPUC Energy Division contact:

  • CPUC: Dina Mackin,

2018 Meeting Materials:

2017 Meeting Materials:

April 17: Introduction to WG, Review of IOUs’ Assumptions & Framework Document, Discussion

  • Webinar recording 
  • participant list
  • meeting notes
  • Agenda:
    • Introductions: Overview of the ACR and purpose of the WG (slides)
      • Supplemental Background (slides)
    • Overview of system level forecasting (slides) and distribution planning (slides)
    • Overview of the IOUs’ Draft Assumptions & Framework Document (slides)
    • System-level Discussion: System-level forecasting assumptions (slides)
    • Distribution-level Discussion: load assumptions and disaggregation methodology (slides)